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  • 1
    ISSN: 1432-0509
    Keywords: Stomach, radiography ; Atrophic gastritis, diagnosis ; Pernicious anemia, gastric lesions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A retrospective study was performed to determine whether the areae gastricae pattern in the stomach or other radiologic features could be used on double-contrast upper gastrointestinal examinations to accurately diagnose atrophic gastritis in pernicious anemia. The double-contrast studies from 21 patients with pernicious anemia and 55 age-matched controls were interspersed and reviewed blindly to assess gastric size, mucosal folds, and the areae gastricae pattern in the stomach. The best set of criteria for differentiating the pernicious anemia group from the controls included a fundal diameter of 8 cm or less, absent mucosal folds in the fundus or body, and small (i.e., 1–2 mm in size) or absent areae gastricae. This combination of findings was present in 81% of patients with pernicious anemia but it also was present in 11% of the controls, so that atrophic gastritis in pernicious anemia could not be reliably diagnosed on radiologic criteria. Nevertheless, patients with pernicious anemia invariably had small or absent areae gastricae in the stomach, so that the presence of prominent areae gastricae, particularly in the fundus, may be a useful criterion for excluding this disease.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Plant systematics and evolution 150 (1985), S. 291-301 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Linaceae ; Linum tenuifolium ; Breeding system ; heterostyly ; self-incompatibility ; pollen production ; seed-set ; colonization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Distyly inLinum tenuifolium L. is associated with a high degree of self-incompatibility. Breakdown in this system has occurred without the morphological rearrangement expected as the result of cross-over within the distyly supergene. Pollen-flow in both distylous and monomorphic populations is leptokurtic. A high proportion of intra-flower pollination occurs. Pollen production per ovule is reduced in the self-compatible race. Mean seed-set is increased. Individuals of the self-compatible race produce less vegetative growth and require a shorter time to reach reproductive maturity under cultivation. Increased fecundity appears to provide the selective advantage promoting the breakdown of self-incompatibility in this species. This is achieved through a massive shift of resources toward female reproductive function in plants of the monomorphic race. Subsequent colonization by this race has led to its increased distribution in C. & S. Europe.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Plant systematics and evolution 153 (1986), S. 243-258 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Linaceae ; Linum tenuifolium L. ; L. suffruticosum L. ; L. salsoloides Lam. ; L. appressum Caballero ; Variation ; phenetics ; systematics ; evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The phenetic variation inL. tenuifolium s.l. was assessed using multivariate analyses of 27 characters found to be variable within the species. These results are discussed and interpreted in the context of the reproductive biology, chromosome number and ecological responses of the taxa. Evidence suggests that both the self-compatible and tetraploid races were derived independently from a self-incompatible, diploid type. Although no taxonomic scheme is compatible with all of the evidence presented, the study supports a recent decision to recognize four taxa at subspecific level.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Plant systematics and evolution 156 (1987), S. 151-157 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Lythraceae ; Lythrum salicaria ; Evolution ; heterostyly ; pollen ; gender specialization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Some of the factors governing seed-set in three populations ofLythrum salicaria are examined during two seasons. Plants spatially segregated from legitimate neighbours by distances exceeding 1m set few seeds. Plants with small inflorescences set fewer seeds than those with medium or large inflorescences. Flowers having self pollen applied to the stigma before legitimate pollination set fewer seed per flower than those pollinated with legitimate pollen only. Seeds of the mid-style morph germinated more effectively than those of the long style morph and seeds of the short-style morph showed very low levels of germination.
    Type of Medium: Electronic Resource
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